We test, and we show our work.
Every batch is verified before a single vial is filled. Identity, purity, and contaminant testing — documented on a certificate that matches the lot in your hand.
How each batch is verified
Two analyses establish what a compound is and how clean it is. We run both, on every batch:
- RP-HPLC (purity). Reverse-phase high-performance liquid chromatography measures what percentage of the material is the target peptide. A stated “≥99%” means 99% of the tested material is the intended compound.
- Mass spectrometry (identity). Confirms the molecule is what the label says by matching measured molecular weight to the expected weight. Purity without identity is incomplete — we report both.
- Endotoxin / appearance / solubility, where applicable to the compound.
A Certificate of Analysis is honest about its limits: it documents identity, purity, and content for a specific lot. It does not, on its own, certify sterility or biological behavior. We state what we measured and nothing more.
Purity, in plain terms
- ≥95% — standard grade for routine in-vitro research.
- ≥98% — ultra-pure, for sensitive quantitative and receptor-binding work.
- ≥99% — reference-standard tier. Our default target.
Certificates of Analysis
Per batch · lot-matched · independent verification
Every order ships with a Certificate of Analysis for the exact lot you receive. The lot number on the certificate matches the number on the vial — a generic, unmatched COA is a red flag, and we don’t issue them. A representative certificate records:
| Compound & lot | Named compound, batch/lot number, fill date |
|---|---|
| Identity | Mass-spec confirmation vs. expected molecular weight |
| Purity | RP-HPLC percentage + chromatogram |
| Testing lab | Independent third-party laboratory, named and dated |
| Origin | Synthesized and tested in Florida, USA |
Batch numbers and certificate values shown across the site are representative placeholders — live COA documents are attached per order and will be linked here as the lab files are finalized.
Made in the USA — the quality argument
Domestic synthesis isn’t a slogan; it’s the basis of our quality control. Compounds are made and tested on U.S. soil, not relabeled from overseas bulk and reshipped. That means a shorter chain of custody, no multi-week transit, and a process we can stand behind by name.
Research updates from Puritas
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For researchers, 21 and over.
Puritas Lab supplies materials for laboratory and research use only. They are not for human or veterinary consumption and are not intended to diagnose, treat, cure, or prevent any disease. By entering, you confirm you are at least 21 years of age and acquiring these materials for legitimate research purposes.
Access to this site constitutes acceptance of our Research-Use Terms. Nothing on this site is an offer to sell, or a solicitation to buy, any product for human use.